Cooperative Extension South Dakota State University

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Each year, from July through late fall, anthrax is reported in South Dakota. The usual victims are cattle, but occasionally swine, sheep, and horses are affected. The disease occurs most frequently along the Missouri River, but occasional outbreaks happen in all regions of the state. The infection is most common where pastures are subject to flooding and frequently occurs when fall rains follow a dry summer. Grazing short pastures seems to increase the likelihood of infection.